CN110256917B - Environment-friendly strong-water-resistance wood paint and preparation method thereof - Google Patents
Environment-friendly strong-water-resistance wood paint and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/06—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to wood
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention discloses an environment-friendly strong-water-resistance wood lacquer and a preparation method thereof, wherein the wood lacquer consists of a primer paint and a coating paint, and the primer paint comprises 55% of water-based acrylic resin, 30% of filler, 10% of sodium dodecyl sulfate and 5% of methyl silicone oil according to weight percentage; the raw materials in the coating paint comprise 50 percent of deionized water, 20 percent of modified base material, 15 percent of modified water-resistant auxiliary agent, 9 percent of dodecyl alcohol ester, 4 percent of polydimethylsiloxane and 2 percent of nonylphenol polyoxyethylene ether according to weight percentage; the invention combines the double water-resistant capability of the modified water-resistant auxiliary agent in the coating paint and the water-resistant promoting effect of the modified base material on the basis of the repairing, leveling and water-resistant capability of the primer paint, so that the wood lacquer has strong water-resistant effect, and bridge deck combination can be formed between the primer paint and the coating paint according to the consumption of hydrophilic groups and hydrophobic form change, so that the combination between the primer paint and the coating paint is more stable.
Description
Technical Field
The invention relates to the technical field of wood lacquer, in particular to environment-friendly strong-water-resistance wood lacquer and a preparation method thereof.
Background
The wood lacquer is a kind of resin lacquer used for wooden products, which can be classified into polyester lacquer, polyurethane lacquer, acrylate lacquer and epoxy lacquer, and can be widely used for the surfaces of furniture, floors, etc. for protection, decoration and beauty.
Most of the existing wood products are easy to have concave-convex and uneven surfaces after being processed, and paint can not be fully fused and contacted with the surfaces of the wood products, so that the using and protecting effects of the wood products are greatly reduced; in addition, the existing wood lacquer has the problem of poor water resistance, and the water resistance is easy to gradually decline along with the lapse of time in the long-term use process, so that the service life of products and wood products is greatly reduced.
The solution is now provided in view of the above problems.
Disclosure of Invention
The invention aims to provide an environment-friendly strong-water-resistance wood lacquer and a preparation method thereof, under the auxiliary action of a surfactant lauryl sodium sulfate, a filler and methyl silicone oil in a primer paint, so that the space occupied by the molecular chain of the water-based acrylic resin is gradually reduced, the molecular chain movement in the corresponding interface region is restricted, and the corresponding chain segment is gradually immobilized, and then the shrinkage rate of the primer paint is reduced, the smoothness is improved, and the primer paint also has the capabilities of repairing, leveling and resisting water according to the combined action of the wood powder, the mica powder, the micro-wax powder and the calcium silicate powder contained in the filler, the situation that the surface of a wooden product is concave-convex and uneven after being processed is avoided, so that paint can be fully fused and contacted with the surface of the wooden product, and the use protection effect of the wooden product is obviously improved;
firstly, synthesizing a polyurethane prepolymer, and then uniformly dispersing acrylic resin in the polyurethane prepolymer, wherein carboxyl and polyether chain segments in the polyurethane prepolymer have affinity to deionized water, when the carboxyl and polyether chain segments are emulsified in the deionized water, the acrylic resin is coated in the polyurethane prepolymer and forms a corresponding core-shell or spherical structure, so that a stable glue film with high branching degree and crosslinking degree is easily formed, and the promotion effect on improving water resistance and weather resistance is excellent;
the modified water-resistant auxiliary agent contains aminopropyl trimethoxy silane and 3- (2-amino ethylamino) propyltrimethoxy silane, and can be quickly spread on the surface of various materials and gradually diffused towards the surface with similar polarity according to the combined action of organophilic group and organophilic group, because thin water layer is adsorbed on the surface of various materials in the atmosphere, the alkoxy at one end of functional group of organophilic group can be hydrolyzed into silicon hydroxyl, oriented on the surface of inorganic material, and can produce hydrolytic polycondensation reaction with hydroxyl on the surface of inorganic material or directly produce polymeric film, so that the content of hydrophilic group can be greatly reduced, and at the same time, the functional group of organophilic group can be directly combined with the surface of organic material, and can be gradually dispersed and bonded in the cross-linking and solidifying process, so that the polyurethane prepolymer in the modified base material can be changed into body structure from linear structure, the hydrophobic effect is greatly improved, namely, the water resistance and the weather resistance of the modified water-resistant auxiliary agent are greatly enhanced according to the combination surface of inorganic phase, intermediate bridge and organic phase formed by consuming hydrophilic groups and hydrophobic form change and the bridge type fusion effect of the bond, and then the double water resistance effect of the modified water-resistant auxiliary agent is combined with the promotion effect of the modified base material, so that the water resistance of the wood lacquer is not gradually reduced due to the time lapse, and the service life of the product and the wooden product is greatly prolonged.
The purpose of the invention can be realized by the following technical scheme: the environment-friendly strong-water-resistance wood lacquer consists of a primer lacquer and a coating lacquer, wherein the primer lacquer comprises 45-65 wt% of water-based acrylic resin, 20-40 wt% of filler, 5-15 wt% of sodium dodecyl sulfate and 3-7 wt% of methyl silicone oil; the filler is prepared from wood powder, mica powder, wax powder and calcium silicate powder in a weight ratio of 1: 1: 1: 1 weight percent;
the primer paint is prepared by the following method: firstly, the water-based acrylic resin and the methyl silicone oil are together led into a mixing tank, the mixture is mixed for 30 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, then the filler and the lauryl sodium sulfate are together led into the mixing tank, the mixture is mixed for 90 minutes at the temperature of 2.4-2.6MPa and 55-65 ℃, the mixture is decompressed, cooled, filtered, decontaminated and concentrated to 2/5 to obtain a primer paint, the space occupied by the molecular chain of the water-based acrylic resin can be gradually reduced under the auxiliary action of the lauryl sodium sulfate serving as a surfactant, the space occupied by the molecular chain of the water-based acrylic resin is limited, the movement of the molecular chain in a corresponding interface area is gradually fixed, the self-shrinkage rate of the primer paint is reduced, the smoothness of the primer paint is improved, and the common action of wood powder, micro wax powder and calcium silicate powder contained in the filler is utilized, the primer paint also has the capabilities of repairing, leveling and resisting water;
the raw materials in the coating paint comprise, by weight, 35-65% of deionized water, 10-30% of modified base materials, 10-20% of modified water-resistant auxiliary agents, 5-13% of dodecyl alcohol ester, 2-6% of polydimethylsiloxane and 1-3% of nonylphenol polyoxyethylene ether;
the modified base material is prepared from acrylic resin, diphenylmethane diisocyanate powder, deionized water and polypropylene glycol in a weight ratio of 4: 2: 7: 1 weight percent; the modified base stock is prepared by the following method: firstly, introducing diphenylmethane diisocyanate powder and deionized water into a reaction kettle, preheating the diphenylmethane diisocyanate powder to 70-80 ℃ under the atmosphere of nitrogen, preserving heat for 60 minutes, continuously dripping polypropylene glycol into the reaction kettle, pressurizing the mixture to 1.5MPa, reacting the mixture for 45 minutes at 85-95 ℃, reducing the pressure to normal pressure, cooling the mixture to 50 ℃, introducing acrylic resin into the reaction kettle, preserving heat, blending the mixture for 30 minutes, cooling, filtering, evaporating and concentrating the mixture to obtain a modified base material, synthesizing polyurethane prepolymer, uniformly dispersing the acrylic resin into the polyurethane prepolymer, wherein carboxyl and polyether chain segments in the polyurethane prepolymer have affinity to the deionized water, and when the acrylic resin and the polyether chain segments are emulsified in the deionized water, the acrylic resin is coated in the polyurethane prepolymer to form a corresponding core-shell or spherical structure, so that a stable glue film with high branching degree and crosslinking degree is easily formed, the paint has excellent promotion effect on improving water resistance and weather resistance;
the modified water-resistant auxiliary agent comprises the following raw materials, by weight, 5-25% of trichlorosilane, 5-25% of chloropropene, 20-30% of methanol, 20-40% of ethylenediamine and 10-20% of ammonia gas; the modified water-resistant auxiliary agent is prepared by the following method: putting trichlorosilane and chloropropene into a reaction kettle together, reacting for 60 minutes at 50-70 ℃ under the condition that a catalyst is chloroplatinic acid, then introducing methanol, reacting for 90 minutes under the conditions that the pressure is 1.5MPa and 110-, performing rotary distillation and filtration to remove excessive methanol, performing aminolysis reaction with a small amount of ethylenediamine at 200 ℃ and 10MPa to generate an effective product 3- (2-aminoethylamino) propyl trimethoxy silane, injecting excessive ammonia gas, performing amination reaction at 350 ℃ and normal pressure to generate an effective product aminopropyl trimethoxy silane, cooling, separating and standing to remove residual ammonia gas to obtain a modified water-resistant auxiliary agent;
and according to that aminopropyl trimethoxy silane and 3- (2-amino ethyl amino) propyl trimethoxy silane both contain organophilic group and organophilic group functional group, and can be quickly spread on the surface of various materials, and can be gradually diffused towards the surface with similar polarity, and because the surface of various materials in the atmosphere is adsorbed with thin water layer, the alkoxy group at one end of the organophilic group functional group can be hydrolyzed into silicon hydroxyl group, and can be oriented on the surface of inorganic material, and can produce hydrolytic polycondensation reaction with hydroxyl group on the surface of inorganic material or directly produce polymeric film, so that the content of hydrophilic group can be greatly reduced, at the same time, the organophilic group functional group can be directly combined with organic material surface, and can be gradually dispersed and cohered in the course of cross-linking and curing, and can make the polyurethane prepolymer in the modified base material change into body-type structure from linear structure, the hydrophobic effect is greatly improved, namely, the water resistance and the weather resistance of the modified water-resistant auxiliary agent are greatly enhanced through the bridge type fusion effect of a bond according to a bonding surface of an inorganic phase, an intermediate bridge and an organic phase formed by consuming hydrophilic groups and hydrophobic form change;
the coating paint is prepared by the following method: firstly, deionized water, dodecyl alcohol ester and a modified base material are led into a stirring tank together, and are blended for 120 minutes at the temperature of 70-80 ℃ at the speed of 240 r/min, then a modified water-resistant auxiliary agent is led into the stirring tank, and are blended for 30 minutes at the temperature of 120 ℃ at the speed of 180 r/min, then polydimethylsiloxane and nonylphenol polyoxyethylene ether are led into the stirring tank together, and are blended for 90 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, and the coating paint is obtained after cooling, filtering, evaporation and concentration to 2/7.
A preparation method of environment-friendly strong-water-resistance wood lacquer consists of the preparation of primer paint and the preparation of coating paint, and comprises the following steps:
1) preparation of primer paint: firstly, introducing the water-based acrylic resin and the methyl silicone oil into a mixing tank, blending for 30 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, introducing the filler and the sodium dodecyl sulfate into the mixing tank, blending for 90 minutes at the temperature of 210 r/min, the pressure of 2.4-2.6MPa and the temperature of 55-65 ℃, reducing the pressure and reducing the temperature, filtering to remove impurities, and concentrating to 2/5 to obtain a primer paint;
2) preparation of coating paint: firstly, introducing deionized water, dodecyl alcohol ester and a modified base material into a stirring tank together, blending for 120 minutes at the temperature of 70-80 ℃ at the speed of 240 r/min, introducing a modified water-resistant auxiliary agent into the stirring tank, blending for 30 minutes at the temperature of 120 ℃ at the speed of 180 r/min, introducing polydimethylsiloxane and nonylphenol polyoxyethylene ether into the stirring tank together, blending for 90 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, cooling, filtering, evaporating and concentrating to 2/7 to obtain a coating paint;
wherein, the filler is prepared from wood powder, mica powder, wax powder and calcium silicate powder in a proportion of 1: 1: 1: 1 weight percent;
wherein the modified base material is prepared from acrylic resin, diphenylmethane diisocyanate powder, deionized water and polypropylene glycol in a weight ratio of 4: 2: 7: 1 weight percent; the modified base stock is prepared by the following method: introducing diphenylmethane diisocyanate powder and deionized water into a reaction kettle, preheating to 70-80 ℃ under the atmosphere of nitrogen, preserving heat for 60 minutes, continuously dripping polypropylene glycol into the reaction kettle, pressurizing to 1.5MPa, reacting for 45 minutes at 85-95 ℃, introducing acrylic resin into the reaction kettle after reducing the pressure to normal pressure and cooling to 50 ℃, preserving heat and blending for 30 minutes, and obtaining a modified base material after cooling, filtering, evaporating and concentrating;
wherein, the raw materials in the modified water-resistant auxiliary agent respectively comprise, by weight, 5-25% of trichlorosilane, 5-25% of chloropropene, 20-30% of methanol, 20-40% of ethylenediamine and 10-20% of ammonia gas; the modified water-resistant auxiliary agent is prepared by the following method: putting trichlorosilane and chloropropene into a reaction kettle together, reacting for 60 minutes at 50-70 ℃ under the condition that a catalyst is chloroplatinic acid, then introducing methanol into the reaction kettle, reacting for 90 minutes under the conditions that the pressure is increased to 1.5MPa and the temperature is increased to 110-.
Further, the application method of the environment-friendly strong-water-resistance wood lacquer comprises the following steps:
s1: firstly heating the primer paint to 50 ℃, uniformly coating the primer paint on the surface of a wooden product, drying the primer paint by hot steam, wiping the primer paint by dry cotton cloth, and repeatedly uniformly coating, drying by steam and wiping the primer paint for multiple times to obtain a primer paint surface;
s2: firstly heating the coating paint to 75 ℃, then uniformly coating the coating paint on the bottom paint surface, and drying by hot air to obtain the coating paint surface.
The invention has the beneficial effects that:
the wood lacquer has strong water-resistant effect by combining the double water-resistant capability of the modified water-resistant auxiliary agent in the coating paint and the water-resistant promoting effect of the modified base material on the basis of the repairing, leveling and water-resistant capability of the primer paint, and the bridge deck combination can be formed between the primer paint and the coating paint according to the consumption of hydrophilic groups and the change of hydrophobic form, so that the combination between the primer paint and the coating paint is more stable, namely, the integral water-resistant capability can be greatly improved while the surface smoothness after coating is ensured;
1. when the primer paint is coated, the space occupied by the molecular chain of the water-based acrylic resin is gradually reduced under the auxiliary action of the surfactant sodium dodecyl sulfate by the filler and the methyl silicone oil, the movement of the molecular chain in a corresponding interface region is limited, and the corresponding chain segment is gradually immobilized, so that the shrinkage rate of the primer paint is reduced, the smoothness of the primer paint is improved, and the primer paint can be more fully fused or contacted with a concave or uneven part on a wood product under the combined action of wood powder, mica powder, micro-wax powder and calcium silicate powder contained in the filler, so that the primer paint has the capabilities of repairing, leveling and resisting water, and the using and protecting effects of the primer paint are obviously improved;
2. when the coating paint is coated, the modified water-resistant auxiliary agent contains aminopropyl trimethoxy silane and 3- (2-aminoethylamino) propyltrimethoxy silane, which are reacted together to spread on the surface of various materials and diffuse gradually toward the surface with similar polarity, so that the alkoxy on one end of the functional group of the organophilic group is hydrolyzed into silicon hydroxyl and oriented to the surface of inorganic material, and the silicon hydroxyl and the hydroxyl on the surface of inorganic material are hydrolyzed and polycondensed to form polymer film, so as to reduce the content of hydrophilic group, and the functional group of the organophilic group is combined directly with the surface of organic material and dispersed gradually during cross-linking and curing, The polyurethane prepolymer in the modified base material is changed into a body structure from a linear structure, so that the hydrophobic effect is greatly improved, namely, the water resistance and the weather resistance of the modified water-resistant auxiliary agent are greatly enhanced through the bridge type fusion effect of an inorganic phase-intermediate bridge-organic phase junction surface formed by hydrophilic groups and hydrophobic form change;
the polyurethane prepolymer is synthesized firstly, then the acrylic resin is uniformly dispersed in the polyurethane prepolymer, and the carboxyl and polyether chain segments in the polyurethane prepolymer have affinity to deionized water, when the polyurethane prepolymer and the polyether chain segments are emulsified in the deionized water, the acrylic resin is coated in the polyurethane prepolymer and forms a corresponding core-shell or spherical structure, so that a stable glue film with high branching degree and crosslinking degree is easily formed, the water resistance and weather resistance of the product are improved, namely, the double water resistance function of the modified water-resistant auxiliary agent is combined with the promotion function of the modified base material, so that the water resistance of the wood lacquer is not gradually reduced due to the lapse of time, and the service life of the product and a wooden product is greatly prolonged.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that:
example 1:
the environment-friendly strong-water-resistance wood lacquer consists of a primer lacquer and a coating lacquer, wherein the primer lacquer comprises 55% of water-based acrylic resin, 30% of filler, 10% of sodium dodecyl sulfate and 5% of methyl silicone oil according to weight percentage; the filler is prepared from wood powder, mica powder, wax powder and calcium silicate powder in a proportion of 1: 1: 1: 1 weight percent;
the primer paint is prepared by the following method: firstly, introducing the water-based acrylic resin and the methyl silicone oil into a mixing tank, blending for 30 minutes at 300 revolutions per minute and 90 ℃, introducing the filler and the sodium dodecyl sulfate into the mixing tank, blending for 90 minutes at 210 revolutions per minute and under the pressure of 2.5MPa and 60 ℃, and performing reduced pressure cooling, filtration and impurity removal and concentration to 2/5 to obtain a primer paint;
the raw materials in the coating paint comprise 50 percent of deionized water, 20 percent of modified base material, 15 percent of modified water-resistant auxiliary agent, 9 percent of dodecyl alcohol ester, 4 percent of polydimethylsiloxane and 2 percent of nonylphenol polyoxyethylene ether according to weight percentage;
the modified base material is prepared from acrylic resin, diphenylmethane diisocyanate powder, deionized water and polypropylene glycol in a weight ratio of 4: 2: 7: 1 weight percent; the modified base material is prepared by the following method: introducing diphenylmethane diisocyanate powder and deionized water into a reaction kettle, preheating to 75 ℃ under the atmosphere of nitrogen, preserving heat for 60 minutes, continuously dripping polypropylene glycol into the reaction kettle, pressurizing to 1.5MPa, reacting at 90 ℃ for 45 minutes, reducing the pressure to normal pressure, cooling to 50 ℃, introducing acrylic resin into the reaction kettle, preserving heat, blending for 30 minutes, cooling, filtering, evaporating and concentrating to obtain a modified base material;
the modified water-resistant auxiliary agent comprises the following raw materials, by weight, 15% of trichlorosilane, 15% of chloropropene, 25% of methanol, 30% of ethylenediamine and 15% of ammonia respectively; the modified water-resistant auxiliary agent is prepared by the following method: putting trichlorosilane and chloropropene into a reaction kettle together, reacting for 60 minutes at 60 ℃ under the condition that a catalyst is chloroplatinic acid, then introducing methanol into the reaction kettle, reacting for 90 minutes under the conditions of pressurizing to 1.5MPa and 120 ℃, performing rotary distillation and filtration to remove impurities, heating the reaction kettle to 200 ℃, pressurizing to 10MPa, introducing ethylenediamine to react for 45 minutes, then reducing the temperature of the reaction kettle to normal pressure, simultaneously heating to 350 ℃ for the second time, injecting ammonia gas to react for 60 minutes, and cooling, separating and standing to obtain a modified water-resistant auxiliary agent;
the coating paint is prepared by the following method: firstly, introducing deionized water, dodecyl alcohol ester and a modified base material into a stirring tank together, blending for 120 minutes at 240 r/min and 75 ℃, introducing a modified water-resistant auxiliary agent into the stirring tank, blending for 30 minutes at 180 r/min and 120 ℃, introducing polydimethylsiloxane and nonylphenol polyoxyethylene ether into the stirring tank together, blending for 90 minutes at 300 r/min and 90 ℃, cooling, filtering, evaporating and concentrating to 2/7 to obtain a coating paint;
the application method of the environment-friendly strong-water-resistance wood lacquer comprises the following steps:
s1: firstly heating the primer paint to 50 ℃, uniformly coating the primer paint on the surface of a wooden product, drying the primer paint by hot steam, wiping the primer paint by dry cotton cloth, and repeatedly uniformly coating, drying by steam and wiping the primer paint for multiple times to obtain a primer paint surface;
s2: firstly heating the coating paint to 75 ℃, then uniformly coating the coating paint on the bottom paint surface, and drying by hot air to obtain the coating paint surface.
A preparation method of environment-friendly strong-water-resistance wood lacquer consists of the preparation of primer paint and the preparation of coating paint, and comprises the following steps:
1) preparation of primer paint: firstly, introducing the water-based acrylic resin and the methyl silicone oil into a mixing tank, blending for 30 minutes at 300 revolutions per minute and 90 ℃, introducing the filler and the sodium dodecyl sulfate into the mixing tank, blending for 90 minutes at 210 revolutions per minute and under the pressure of 2.5MPa and 60 ℃, and performing reduced pressure cooling, filtration and impurity removal and concentration to 2/5 to obtain a primer paint;
2) preparation of coating paint: firstly, deionized water, dodecyl alcohol ester and a modified base material are led into a stirring tank together, and are blended for 120 minutes at the temperature of 240 r/min and 75 ℃, then a modified water-resistant auxiliary agent is led into the stirring tank, and is blended for 30 minutes at the temperature of 180 r/min and 120 ℃, and then polydimethylsiloxane and nonylphenol polyoxyethylene ether are led into the stirring tank together, and are blended for 90 minutes at the temperature of 300 r/min and 90 ℃, and after cooling, filtering, evaporating and concentrating to 2/7, a coating paint vehicle is obtained.
Example 2:
the environment-friendly strong-water-resistance wood lacquer is different from that in the embodiment 1 in that the wood lacquer only consists of a coating paint without a bottom paint and relevant contents;
the application method of the environment-friendly strong-water-resistance wood lacquer comprises the following steps: firstly heating the coating paint to 75 ℃, uniformly coating the coating paint on the surface of the wood product, and drying by hot air to obtain a coating paint surface.
The preparation method of the environment-friendly strong-water-resistance wood lacquer is different from that in the embodiment 1 in that the environment-friendly strong-water-resistance wood lacquer only consists of the preparation of a coating paint vehicle and does not contain 1) the preparation of a primer paint vehicle.
Example 3:
an environment-friendly strong-water-resistance wood lacquer is different from that in the embodiment 1 in that the modified base material is completely replaced by acrylic resin, and relevant contents in the preparation aspect of the original modified base material are deleted.
The difference between the preparation method of the environment-friendly strong-water-resistance wood lacquer and the embodiment 1 is that 2) the modified base material is completely replaced by acrylic resin in the preparation of the coating paint.
Example 4:
an environment-friendly strong-water-resistant wood lacquer is different from that in the embodiment 1 in that raw materials in a coating paint are 56% of deionized water, 25% of modified base material, 11% of dodecyl alcohol ester, 5% of polydimethylsiloxane and 3% of nonylphenol polyoxyethylene ether in percentage by weight respectively, and relevant contents in the preparation aspect of the original modified water-resistant auxiliary agent are deleted;
the coating paint is prepared by the following method: firstly, deionized water, dodecyl alcohol ester and a modified base material are led into a stirring tank together, and are blended for 120 minutes at the temperature of 240 r/min and 75 ℃, then polydimethylsiloxane and nonylphenol polyoxyethylene ether are led into the stirring tank together, and are blended for 90 minutes at the temperature of 300 r/min and 90 ℃, and after cooling, filtering, evaporation and concentration are carried out until 2/7, the coating paint is obtained.
The difference between the preparation method of the environment-friendly strong-water-resistance wood lacquer and the embodiment 1 is that 2) the preparation of the coating paint vehicle comprises the following steps: firstly, deionized water, dodecyl alcohol ester and a modified base material are led into a stirring tank together, and are blended for 120 minutes at the temperature of 240 r/min and 75 ℃, then polydimethylsiloxane and nonylphenol polyoxyethylene ether are led into the stirring tank together, and are blended for 90 minutes at the temperature of 300 r/min and 90 ℃, and after cooling, filtering, evaporation and concentration are carried out until 2/7, the coating paint is obtained.
Example 5:
an environment-friendly strong-water-resistant wood lacquer is different from that in the embodiment 1 in that the raw materials in the modified water-resistant auxiliary agent respectively comprise 20 percent of trichlorosilane, 20 percent of chloropropene, 25 percent of methanol and 35 percent of ethylenediamine in percentage by weight;
the modified water-resistant auxiliary agent is prepared by the following method: putting trichlorosilane and chloropropene into a reaction kettle together, reacting for 60 minutes under the condition that a catalyst is chloroplatinic acid and 60 ℃, then introducing methanol into the reaction kettle, reacting for 90 minutes under the condition that the pressure is increased to 1.5MPa and the temperature is 120 ℃, performing rotary distillation and filtration to remove impurities, heating the reaction kettle to 200 ℃, pressurizing to 10MPa, introducing ethylenediamine into the reaction kettle to react for 45 minutes, cooling, reducing the pressure, separating and standing to obtain the modified waterproof auxiliary agent.
The preparation method of the environment-friendly strong-water-resistance wood lacquer is the same as that in the embodiment 1.
Example 6:
the difference between the environment-friendly strong-water-resistant wood paint and the embodiment 1 is that the application method of the environment-friendly strong-water-resistant wood paint comprises the following steps: firstly, mixing the primer paint and the coating paint, heating to 75 ℃, uniformly coating the mixture on the surface of the wood product, and drying by hot air to obtain a coating finish.
The preparation method of the environment-friendly strong-water-resistance wood lacquer is the same as that in the embodiment 1.
Comparative results obtained according to the above examples 1 to 6 are given in the following table:
TABLE 1 analysis of the results
As shown by comparison between the example 1 and the example 2 in the table 1-the experimental result analysis table, the difference between the surface flatness of the wood lacquer and the surface flatness of the wood lacquer is larger, and the surface flatness is shown as the surface flatness when the wood lacquer is used for coating the same concave and uneven wood product, but because the primer lacquer in the example 2 is not present, the space occupied by the molecular chain of the water-based acrylic resin is gradually reduced under the auxiliary action of the surfactant sodium dodecyl sulfate, the molecular chain movement in the corresponding interface region is limited, and the corresponding chain segment is gradually fixed, so that the shrinkage rate of the primer lacquer is reduced, the smoothness is improved, and the fusion or contact between the primer lacquer and the concave and uneven parts of the wood product is more sufficient according to the combined action of the wood powder, the mica powder, the micro-wax powder and the calcium silicate powder contained in the filler, therefore, the numerical values in the embodiment 1 and the embodiment 2 are obviously different;
as shown in table 1-experimental result analysis table comparing example 1 with example 3, the difference between the softening coefficient and the water absorption rate of the two is larger, because in example 1, compared to example 3, the acrylic resin is modified, and the polyurethane prepolymer is synthesized first, and then the acrylic resin is uniformly dispersed therein, and the carboxyl group and the polyether chain segment in the polyurethane prepolymer have affinity to the deionized water, when the two are emulsified in the deionized water, the acrylic resin is coated in the polyurethane prepolymer to form a corresponding core-shell or spherical structure, so that a stable adhesive film with high branching degree and crosslinking degree is easily formed, and the promotion effect on improving water resistance and weather resistance is excellent, therefore, the difference between the values in example 1 and example 3 is obvious;
as shown by the comparison of example 1 with example 4 and example 5 in the analysis table of the experimental results in Table 1, the softening coefficient and the water absorption rate of the two are both much different, and the value of example 4 is much different from that of example 5, because example 1 is compared with example 4, the modified water-resistant auxiliary agent is not present in example 4, and example 1 is compared with example 5, the modified water-resistant auxiliary agent is absent in example 5, i.e. only trichlorosilane and chloropropene are subjected to addition reaction at 60 ℃ under the condition that the catalyst is chloroplatinic acid, to form chloropropyltrichlorosilane as a pure intermediate product, excessive methanol is subjected to alcoholysis reaction at 1.5MPa and 120 ℃ to form chloropropyltrimethoxysilane as a secondary intermediate product, and the excessive methanol is removed by rotary distillation and filtration, and then the excessive methanol is added with a small amount of ethylenediamine at 200 DEG, and 5 DEG, The aminolysis reaction is carried out under 10MPa to generate an effective product 3- (2-aminoethylamino) propyl trimethoxy silane, while in the embodiment 1, the amino propyl trimethoxy silane and the 3- (2-aminoethylamino) propyl trimethoxy silane both contain organophilic functional groups and inorganphilic functional groups to rapidly spread on the surfaces of various materials and gradually diffuse towards the surfaces with similar polarity, and as thin water layers are adsorbed on the surfaces of various materials in the atmosphere, alkoxy at one end of the organophilic functional groups is hydrolyzed into silicon hydroxyl which is oriented on the surfaces of the inorganic materials and is subjected to hydrolytic polycondensation reaction with the hydroxyl on the surfaces of the inorganic materials or directly generates a polymeric film, so that the content of the hydrophilic groups is greatly reduced, and meanwhile, the organophilic functional groups are directly combined with the surfaces of the organic materials, and gradually disperse and bond in the cross-linking and curing process, so that the polyurethane prepolymer in the modified base material can be changed into a body-type structure from a linear structure, the hydrophobic effect is greatly improved, namely, the water resistance and the weather resistance of the modified water-resistant auxiliary agent are greatly enhanced according to the combination surface of an inorganic phase, an intermediate bridge and an organic phase formed by consuming hydrophilic groups and form change and through the bridge-type fusion effect of the bond, so that the dual effect in the embodiment 1 has no any effect with the embodiment 4, and the single effect in the embodiment 5 is compared, namely, the numerical values of the embodiment 1 are obviously different from those of the embodiment 4 and the embodiment 5, and the numerical value of the embodiment 4 is larger than that of the embodiment 5;
as shown in table 1-experimental results, the difference between the softening coefficient, water absorption rate and surface flatness of example 1 and example 6 is large because the application methods of example 1 and example 6 are different, and the primer paint and the coating paint are mixed, so that the primary treatment effects of repairing, leveling and water resistance of the wooden product cannot be achieved, and the effect of combining the double water resistance of the modified water-resistant adjuvant in the coating paint and the water resistance promoting effect of the modified base material is greatly reduced, so that it is difficult to take the guarantee of the surface flatness after coating as the basis and accordingly improve the overall water resistance, and thus the difference between the values of example 1 and example 6 is significant.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. The environment-friendly strong-water-resistance wood paint consists of a primer paint and a coating paint, and is characterized in that the primer paint comprises 45-65 wt% of water-based acrylic resin, 20-40 wt% of filler, 5-15 wt% of sodium dodecyl sulfate and 3-7 wt% of methyl silicone oil; the filler is prepared from wood powder, mica powder, wax powder and calcium silicate powder in a weight ratio of 1: 1: 1: 1 by weight ratio;
the primer paint is prepared by the following method: firstly, introducing the water-based acrylic resin and the methyl silicone oil into a mixing tank, blending for 30 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, introducing the filler and the sodium dodecyl sulfate into the mixing tank, blending for 90 minutes at the temperature of 210 r/min, the pressure of 2.4-2.6MPa and the temperature of 55-65 ℃, reducing the pressure and reducing the temperature, filtering to remove impurities, and concentrating to 2/5 to obtain a primer paint;
the raw materials in the coating paint comprise, by weight, 35-65% of deionized water, 10-30% of modified base materials, 10-20% of modified water-resistant auxiliary agents, 5-13% of dodecyl alcohol ester, 2-6% of polydimethylsiloxane and 1-3% of nonylphenol polyoxyethylene ether;
the modified base material is prepared from acrylic resin, diphenylmethane diisocyanate powder, deionized water and polypropylene glycol in a weight ratio of 4: 2: 7: 1 in a weight ratio; the modified base stock is prepared by the following method: introducing diphenylmethane diisocyanate powder and deionized water into a reaction kettle, preheating to 70-80 ℃ under the atmosphere of nitrogen, preserving heat for 60 minutes, continuously dripping polypropylene glycol into the reaction kettle, pressurizing to 1.5MPa, reacting for 45 minutes at 85-95 ℃, introducing acrylic resin into the reaction kettle after reducing the pressure to normal pressure and cooling to 50 ℃, preserving heat and blending for 30 minutes, and obtaining a modified base material after cooling, filtering, evaporating and concentrating;
the modified water-resistant auxiliary agent comprises the following raw materials, by weight, 5-25% of trichlorosilane, 5-25% of chloropropene, 20-30% of methanol, 20-40% of ethylenediamine and 10-20% of ammonia gas; the modified water-resistant auxiliary agent is prepared by the following method: placing trichlorosilane and chloropropene into a reaction kettle together, reacting for 60 minutes at 50-70 ℃ under the condition that a catalyst is chloroplatinic acid, then introducing methanol into the reaction kettle, reacting for 90 minutes under the conditions that the pressure is increased to 1.5MPa and the temperature is increased to 110-;
the coating paint is prepared by the following method: firstly, deionized water, dodecyl alcohol ester and a modified base material are led into a stirring tank together, and are blended for 120 minutes at the temperature of 70-80 ℃ at the speed of 240 r/min, then a modified water-resistant auxiliary agent is led into the stirring tank, and are blended for 30 minutes at the temperature of 120 ℃ at the speed of 180 r/min, then polydimethylsiloxane and nonylphenol polyoxyethylene ether are led into the stirring tank together, and are blended for 90 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, and the coating paint is obtained after cooling, filtering, evaporation and concentration to 2/7.
2. The preparation method of the environment-friendly strong water-resistant wood lacquer according to claim 1, which consists of the preparation of a primer paint and the preparation of a coating paint, and is characterized by comprising the following steps:
1) preparation of primer paint: firstly, introducing the water-based acrylic resin and the methyl silicone oil into a mixing tank, blending for 30 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, introducing the filler and the sodium dodecyl sulfate into the mixing tank, blending for 90 minutes at the temperature of 210 r/min, the pressure of 2.4-2.6MPa and the temperature of 55-65 ℃, reducing the pressure and reducing the temperature, filtering to remove impurities, and concentrating to 2/5 to obtain a primer paint;
2) preparation of coating paint: firstly, introducing deionized water, dodecyl alcohol ester and a modified base material into a stirring tank together, blending for 120 minutes at the temperature of 70-80 ℃ at the speed of 240 r/min, introducing a modified water-resistant auxiliary agent into the stirring tank, blending for 30 minutes at the temperature of 120 ℃ at the speed of 180 r/min, introducing polydimethylsiloxane and nonylphenol polyoxyethylene ether into the stirring tank together, blending for 90 minutes at the temperature of 80-100 ℃ at the speed of 300 r/min, cooling, filtering, evaporating and concentrating to 2/7 to obtain a coating paint;
wherein, the filler is prepared from wood powder, mica powder, wax powder and calcium silicate powder in a proportion of 1: 1: 1: 1 by weight ratio;
wherein the modified base material is prepared from acrylic resin, diphenylmethane diisocyanate powder, deionized water and polypropylene glycol in a weight ratio of 4: 2: 7: 1 in a weight ratio; the modified base stock is prepared by the following method: introducing diphenylmethane diisocyanate powder and deionized water into a reaction kettle, preheating to 70-80 ℃ under the atmosphere of nitrogen, preserving heat for 60 minutes, continuously dripping polypropylene glycol into the reaction kettle, pressurizing to 1.5MPa, reacting for 45 minutes at 85-95 ℃, introducing acrylic resin into the reaction kettle after reducing the pressure to normal pressure and cooling to 50 ℃, preserving heat and blending for 30 minutes, and obtaining a modified base material after cooling, filtering, evaporating and concentrating;
wherein, the raw materials in the modified water-resistant auxiliary agent respectively comprise, by weight, 5-25% of trichlorosilane, 5-25% of chloropropene, 20-30% of methanol, 20-40% of ethylenediamine and 10-20% of ammonia gas; the modified water-resistant auxiliary agent is prepared by the following method: putting trichlorosilane and chloropropene into a reaction kettle together, reacting for 60 minutes at 50-70 ℃ under the condition that a catalyst is chloroplatinic acid, then introducing methanol into the reaction kettle, reacting for 90 minutes under the conditions that the pressure is increased to 1.5MPa and the temperature is increased to 110-.
3. The environment-friendly high-water-resistance wood paint as claimed in claim 1, wherein the application method of the environment-friendly high-water-resistance wood paint comprises the following steps:
s1: firstly heating the primer paint to 50 ℃, uniformly coating the primer paint on the surface of a wooden product, drying the primer paint by hot steam, wiping the primer paint by dry cotton cloth, and repeatedly uniformly coating, drying by steam and wiping the primer paint for multiple times to obtain a primer paint surface;
s2: firstly heating the coating paint to 75 ℃, then uniformly coating the coating paint on the bottom paint surface, and drying by hot air to obtain the coating paint surface.
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| CN113150601B (en) * | 2021-04-27 | 2022-07-29 | 浙江力强科技有限公司 | Three-proofing paint repairing agent and preparation method thereof |
| CN115322652A (en) * | 2022-09-16 | 2022-11-11 | 安溪县贤发工艺制品有限公司 | Weather-resistant iron art product and preparation method thereof |
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